add codespaces-configuration

[ptahmose]

Description

Adding a .devcontainer folder with some default configuration. This should allow to build libCZI (including CZICmd and with libcurl-support) right from the start (depending on #86).

The only modifications of the boilerplate code (c.f. here) we made are:

• we install some apt packages (within Dockerfile)
• we configure VSCode to use some switches for the CMake-configure run which instruct to build libCZI/CZICmd with "all availabile features"

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

Checklist:

• I followed the Contributing Guidelines.
• I did a self-review.
• I commented my code, particularly in hard-to-understand areas.
• I updated the documentation.
• I updated the version of libCZI following Versioning of libCZI depending on the type of change
  • Bug fix -> PATCH
  • New feature -> MINOR
  • Breaking change -> MAJOR
• I have added tests that prove my fix is effective or that my feature works.
• New and existing unit tests pass locally with my changes.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (9affb0e) 65.38% compared to head (b1fe80e) 65.38%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #87   +/-   ##
=======================================
  Coverage   65.38%   65.38%           
=======================================
  Files          83       83           
  Lines       10621    10621           
=======================================
  Hits         6945     6945           
  Misses       3676     3676           

Flag	Coverage Δ
windows-latest	65.38% <ø> (ø)

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[sdierg]

Adding a .devcontainer file would imply to encourage the use of a docker container fo VS code. So I would have expected an adaption in the "how-to-build" documentation.
The rest looks fine for me, but I did not try it. I really like the approach using docker containers with VS code for C++ development.

Now we are one step from building (and maintaining) containers for building (locally and in pipelines)...

[sdierg]

As I did not try and only had a coarse look, my suggestion is to wait at least for one other review.
Please see my comment on the build documentation.

[DaveyJonesBitPail]

I think it looks good. We may want to add some extra extensions / features in the future (like cmantic or clangd) but everything that is installed in the base image should work pretty well.